Write file in EXT2

Sumit,

In fact, if you're looking at journalizing ext2, ext3 has already done it.

Regards,
Frank

Quoted 41 lines · Frank Davis

Sumit,

Why do you have to do this in the kernel? I can envision doing printks after each read and write call, and having a userland program receive the kernel output, storing it into a buffer, and then writing that buffer, either using fprintf, or fflush, etc.

Regards,
Frank

Quoted 27 lines · Sumit Narayan

Hi,

I would like to create a log file containing the reads and writes made on a disk, by adding a function in the kernel. And once this log table reaches a limit, say 10,000 records, I would like it to be written on hard disk automatically. I am unable to do this, since I dont know how to write to a file, while in the kernel. I tried System Calls, but they dont seem to work. Could someone tell me what is the list of functions that I need to use to do this job. I think I have to play with super-blocks and inodes. But I dont know how to do that. :) Please help me.
Thanks.
Sumit

p.s. I am using Kernel 2.4.20 and want this in EXT2 FS

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Hi,

Thanks for the details.

I wish to know which application access which file, when.. etc etc. I would like to create a log of that. I am unable to write this log to the file from within the kernel. I would not like to go to the user level programs. I am doing this from within the kernel, as I would like to know exactly when things are being done.